Oiling device for rock drills



Oct. 30, 1923. mvmm L. C. BAYLES OILQING DEVICE FOR ROCK DRILLS Filed Nov. 29, 1921 K Hls ATTORTNY Patented Oct. 30, 1923.

UNITED STATES PATENT OFFICE.

LEWIS C. BAYLES, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

OILING DEVICE 1'03 ROCK DBILLS.

Application filed November 29, 1921. Serial No. 518,549.

To all whom it may concern:

Be it known that I, LEWIS C. BAYLES, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a certain ()iling Device for Rock Drills, of which the following is a specification, accompanied by drawings.

This invention relates to fluid actuated rock drills, more especially of the hammer type, but relates particularly to an oiling device for lubricating the front end parts of a machine in which automatic rotation is provided for the drill steel.

The objects of the invention are to improve upon and simplify such type of oiling device and produce a self-contained oiling system wholly within the front head of the machine.

Further objects of the invention will hereinafter appear and the invention is shown in one of its preferred forms in the accompanying drawings, in which Figure 1 is a side elevation of a rock drillv partly in vertical section on the broken line'11 of Figure 3,

Figure 2 is a horizontal sectional view of the machine on the line 2-2 of Figure 1, looking in the direction of the arrows, and

Figure 3 is a horizontal sectional view of Figure 1 on either one of the lines 3-3 looking in the direction of the arrows.

Referring to the drawings, a jackhamer has been selected to illustrate the invention,

only so much of the operative parts of the machine being shown in detail as will onable the invention to be understood. The cylinder A has. the usual back end parts and handle B secured together by the bolts C. Motive fluid is supplied at the inlet D in the distributing valve chest E. The

fluted forward extension F of the reciprocating hammer piston is indicated in sliding but non-rotating engagement with the chuck (it revoluble in the front head H, which is secured to the cylinder by means of the side bolts J. The shank of a drill steel K extends into the chuck G in position to receive the blows of impact of the hammer extension F.

I have found that oil chambers L may be conveniently and readily formed in the walls of the front head and supplied with oil through an oqpning 0 adapted to be closed by th oil plug In order to provide inner walls for the chambers L, and yet permit communication with the internal parts of the machine, I insert a perforated sleeve Q, in the front head preferably from the rearward end. The perforations R in the sleeve Q, opposite the chambers L permit the lubrication of the rotating chuck G of the machine. The sleeve Q also forms a hearing and guide for the chuck G and in the present instance the sleeve Q abuts against the internal shoulder S in the fronthead, and is thus held in longitudinal position.

I claim:

1. In a rock drill, the combination with a cylinder and reciprocating piston, of a front head having oil chambers in its walls, a separate means forming an inner wall for said chambers, means for introducing oil into said chambers and ports affording communication between the said chambers and the interior of the front head.

2. In a rock drill, the combination with a cylinder and reciprocating piston, a front head and rotating chuck therein, of means for oiling the rotatin chuck, comprising oil chambers formed 1n a portion of the front head, a perforated sleeve forming the internal walls of said chambers and permitting commfiinication between the oil chambers and the interior of the sleeve, and means for supplying lubricating material to said chambers.

3. In a rock drill, the combination with the cylinder and reciprocating piston, of a front head having chambers in its walls, a sleeve within the front head covering said chambers and having perforations affording communication between the chambers and the interior of the sleeve, a chuck rotatable within said sleeve, and means for supplying lubricating material to said chambers for lubricating the chuck.

4. In a rock drill, the combination with a cylinder and a reciprocating piston, a front head and rotating chuck therein, an oil chamber formed in said front head, a perforated sleeve forming the internal wall of said chamber and providing a bearing for said chuck, and means for supplyin a lubricant to said chamber for lubricating the chuck.

In testimony vhereof I have signed this specification. 

